554625domain: NAppears in sequencesNumber of zero-sum -3..3 arrays of n elements with first through third differences also in -3..3.at n=12A202506Number of (n+2) X (4+2) 0..1 arrays with no 3 x 3 subblock diagonal sum less than the antidiagonal sum or central row sum less than the central column sum.at n=23A258890